How do I gain motivation and self worth?
Hi. You can talk back to your thoughts. You can even name it if you would like. You can call it a name like Bobby or something like "the worry monster." When you ask yourself "what if they're right?" reply with "What if they're wrong?" A couple ways to increase your self-esteem is to state a positive affirmation many times a day and also to say or list 3 of your qualities daily. State, "I am enough" repeatedly as you shower. Write "I am enough" on every mirror you own. Listen to an "I am enough meditation." You can find this on YouTube. I recommend one by Marisa Peer. However, if you don't like that one, choose one of your liking. Write "I am enough" on your hand. Set a reminder in your phone that goes off twice a day that says, "I am enough."
Think of 3 of your qualities daily. Write them down in a journal or look yourself in the mirror and say 3 kind things to yourself. Tell yourself the things you would have wanted to hear from your dad or brother, a boss, friend, anyone. Say things like "You're amazing!" "You're kind." "You're successful", etc. Listen to 3 Secrets to Boost Your Self-esteem by Marisa Peer on YouTube. Also listen to Why All Our Insecurities Come From This One Thing by Marisa Peer.
Think of 3 things you did right today. What does that say about you? If you listened to a co-worker, it could mean you're a good listener. If you finished a project, it could mean you're diligent. Another way to think of your qualities is to think of qualities you don't like in others such as lying. If you don't lie then you can say, "I am honest." Or what positive things do others say about you? Write it down.
We are operating from our subconscious 95% of the time. Your subconscious doesn't differentiate from fact and fiction. It will believe whatever is repeated enough. You only believe your dad and brother because you heard it 16 years. It wasn't true. You can reprogram your mind by telling it new affirmations like "I am enough" and reminding your subconscious of your positive qualities over and over again---every single day. Consistency is key.
It's great that you're exercising. Other things that build happiness are practicing gratitude (look up the scientific benefits of gratitude), meditating, positive journaling, acts of kindness, and fostering social relationships.